EBDSM-PRM is a compact surface Mounted Ceiling PIR Presence/Absence Detector, provide automatic control for lighting, heating and ventilation loads. No external control boxes are required as the unit is self contained. Three models are available: premium (PRM), direct dim (DD), and analogue dim (AD) all of which will switch a wide range of luminaires. The direct dim variant controls DALI or DSI digital dimming ballasts whilst the analogue dim variant controls 1–10V dimming ballasts.